Crank-shaft bearing



June 1 7, 1.930.

H AUSTIN CRANK SHAFT. BEARING Filed Oct. 10.. 1927 2 Sheets-Sheet 1 June 17, 1930. I AUSTIN 1,764,672

CRANK SHAFT BEARING Fil ed Oct. i0, 192'! 2 Sheets-Sheet 2 Patented June 17, 1930 HERBERT AUSTIN, F- nno usenovnyniysnann f CRANK-SHAFT: EAnr m Application filed October 10, 1927, Serial No. 225,},59, 9.

This invention relates more especially to the bearings of the crank shafts of internal combustion engines; but is applicable to other bearings of a like type, and has for its 5 object to provide an improved construction thereof." I

According to the main feature of this invention, the bearing is constructed in two halves, as is usual; but each halfbearing is of a much greater relative diameter than has heretofore been usual and the holes for the bolts or set pins by which the half bearings are held in place are formed so that the bolts or set pins pass through the half bearings 1.5 themselves, instead of at either side thereof and through the cap as has heretofore been usual.

'The bearings are preferably formed of a relatively hard metal such as iron, steel or brass, so that they are very durable and are well adapted forthe formation of tapped holes therein. They may be provided with white metal liners in the'usual way.v

As the bolts or set-pins pass through holes in the half bearings themselves, there is no need to provide a separate, cap as the outer r half of a hearing may be utilized. as such.

In order that the invention maybe clearly understood, convenient, applications thereof H to the draware described with reference I ,ings herewith, of wh1chp I Figure 1 is a part elevation and part sec- If; Y

131011 of a'cra-nk case bearing constructed ac- K cording to thisinvention.

of; Figure 1; and,

Figures 3, land 5 are part sectional views illustrating modifications of the invention.

Referring first to Figures 1 and 2-, A is a' porti on of the crank case constitutinga bearing carriage and its under surface a is of V semi-cylindrical form concentric with the axis of the shaftand adapted to receive the half of the bearing secured in relation to the upper half 'by long bolts D which pass right through clearance holes 0 b in the bearing I Figure 2' is a section taken on the line2, 2, ndvifiw d o'wn the dyli upper halfB of the bearing. C is the lower S Faiths or .Q P pr i l'e dW e to I a i Y.- $l hT6993 1 t e-"Pia e the $1 9 ngs 'l D r m earning. Each bolt-"D S ,p: vided aag u lous nd it a sem -@i lesa ha it ii 'suhk somewh t w th.- nfle- *riage meetin utsehal ;W ebse tesn9ndi11e1y l 13 than a SE-I11 cleli lenab edt en e withi th icarr. riage to some extent ta-lo ate itselfiprope ly in relaticn .torthe c ha fzfiibuhsi be theeylin- ;drical vportion a- ,of ;the carriage A does not exceed a semi-circle ,there is novtendency for the ihalfjbe ringfl to beco'me wedged there- :lIl- J- 1 ffl "I" .i Q'L fi f i liltlwillz e seen thatthe outer halfibear-ing' Qifbrmsalso thecapm Eachihalf hearing may be of hard metal provided withatwhite metal ,K a supplypipe lfor; lubricating ..oil.a '5 t is I i. i.

i gure 3, each longsbolt D l rews at its inner end into a eleO inthe upper half bearingB: I two" set pinsM serve to I secure, the alf of the b arin {in lace *in the A ile" two lower st'friin"jsl l l""serve (i dWGrJfhaI ifF-i l V "the loiig 'boilts D, :o'f Figure ,1 1 or y e '3 may'beextended beyond their heads r bl e TU ti i na th y in x ea semble.-

{ ne olt Dim however ey e curing the upper half bearing, is placed in the mid vertical plane of the crankcase'and screws at its lower end into a central tapped hole Q; The other set pins N screwing.into

half B. is les lacedby tyvo set pins M-N n, chinuse. v Referring td" F1gure 4 a set-pin M for selower half bearing C which at its upper face is shaped to fit into the recess.

Having fully described my invention what I claim and desire to secure by Letters Patent is 1. A bearing for a crank shaft comprising a bearing member in two parts, an inner part bearing and an outer part bearing, a bearing carriage having a part cylindrical concave surface to receive a; counterpart surface of sald lnner part bearing, and said outer part.

bearing entering to some extent within the confines of said concave surface of the carriage so that the said outer part hearing may transmit lateral pressure to said carriage, and securing bolts passing through said outer part bearing and through said inner part bearing, said bolts being entirely within the confines of the concave surface of said car riage at the line where said outer and inner bearing parts contact. I

2. A bearing carriage for a crank shaft comprising a bearing member in twoparts,

an inner part bearing and an outer part hearing, a bearing carriage having a half cylindrical concave surface'to receive a counterpart surface of said inner part bearing, said inner part bearing being somewhat less than a semicylinder, so 'as to permitof said outerpart bearing entering'within the confines of the carriage, and securing bolts passing through said outer. part bearing and the-said inner part bearing, said bolts being entirely within the confines of the concave surface of said carriageat the llne where said outer and '1n nerbearingparts contact. 7

'3. A bearing for a crank shaft comprising a bearing member in two parts, an inner part bearing and an outer part bearing, a bearing carriage having a part cylindrical concave surfacetoreceivea counterpartsurfaceof said innerpart bearing, and said'outer part bearingentering. to some extent within the confines ofsaid concave surface of the carriage',"so-that the said outer member may transmit lateral pressure to said carriage,

and securing bolts passing through said'outer and inner. part bearings and through said car- I 5 r iage, said bolts being entirely within the V confines of the concave surface of said carr ageat' the line wheresald outer and'lnner bearing parts contact.

-In.wit: ess whereof have hereunto signed l my name this 21st day of. September, 1927.

HERBERT AUSTIN. 

